article: Hip-hop dancing  is popular with many young people today. They like it because they can invent their own moves. They use this dance to show their love for life. It also shows that they feel good about life,that they just want to be themselves and enjoy life,and that they are not afraid of problems.
  Hip-hop dancing has a history of more than 20 years. It first began in the 1980s in the US. In early times,it was seen in New York and Los Angles. At that time,many young black people often danced to the music in the streets.They used their legs,arms,heads and even shoulders to dance.Many young people still use most of these moves today.
  Hip-hop dancing became popular all over the world because of the 1983 movie Flash dance .Some people performed Hip-hop dancing in the movie.People enjoyed their performance.They began to dance like them.Then it became popular .There are two kinds of Hip-hop dancing:new school and old school.More and more young people are learning Hip-hop dancing.People believe that it is a good way to exercise their bodies,and that it is good for their health.
question: The young black people used their  _   to dance at that time.
options: legs heads arms and shoulders A , B and C